/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

/*
 * Definitions of various common control characters.
 * For EBCDIC we have to use different values.
 */

#ifndef EBCDIC

/* IF_EB(ASCII_constant, EBCDIC_constant) */
#define IF_EB(a, b) a

#define CharOrd(x) ((x) < 'a' ? (x) - 'A' : (x) - 'a')
#define CharOrdLow(x) ((x) - 'a')
#define CharOrdUp(x) ((x) - 'A')
#define ROT13(c, a) (((((c) - (a)) + 13) % 26) + (a))

#define NUL '\000'
#define BELL '\007'
#define BS '\010'
#define TAB '\011'
#define NL '\012'
#define NL_STR (char_u *)"\012"
#define FF '\014'
#define CAR '\015' /* CR is used by Mac OS X */
#define ESC '\033'
#define ESC_STR (char_u *)"\033"
#define ESC_STR_nc "\033"
#define DEL 0x7f
#define DEL_STR (char_u *)"\177"

#define POUND 0xA3

#define Ctrl_chr(x) (TOUPPER_ASC(x) ^ 0x40) /* '?' -> DEL, '@' -> ^@, etc. */
#define Meta(x) ((x) | 0x80)

#define CTRL_F_STR "\006"
#define CTRL_H_STR "\010"
#define CTRL_V_STR "\026"

#define Ctrl_AT 0 /* @ */
#define Ctrl_A 1
#define Ctrl_B 2
#define Ctrl_C 3
#define Ctrl_D 4
#define Ctrl_E 5
#define Ctrl_F 6
#define Ctrl_G 7
#define Ctrl_H 8
#define Ctrl_I 9
#define Ctrl_J 10
#define Ctrl_K 11
#define Ctrl_L 12
#define Ctrl_M 13
#define Ctrl_N 14
#define Ctrl_O 15
#define Ctrl_P 16
#define Ctrl_Q 17
#define Ctrl_R 18
#define Ctrl_S 19
#define Ctrl_T 20
#define Ctrl_U 21
#define Ctrl_V 22
#define Ctrl_W 23
#define Ctrl_X 24
#define Ctrl_Y 25
#define Ctrl_Z 26
/* CTRL- [ Left Square Bracket == ESC*/
#define Ctrl_BSL 28 /* \ BackSLash */
#define Ctrl_RSB 29 /* ] Right Square Bracket */
#define Ctrl_HAT 30 /* ^ */
#define Ctrl__ 31

#else

/* EBCDIC */

/* IF_EB(ASCII_constant, EBCDIC_constant) */
#define IF_EB(a, b) b

/*
 * Finding the position in the alphabet is not straightforward in EBCDIC.
 * There are gaps in the code table.
 * 'a' + 1 == 'b', but: 'i' + 7 == 'j' and 'r' + 8 == 's'
 */
#define CharOrd__(c) ((c) < ('j' - 'a') ? (c) : ((c) < ('s' - 'a') ? (c)-7 : (c)-7 - 8))
#define CharOrdLow(x) (CharOrd__((x) - 'a'))
#define CharOrdUp(x) (CharOrd__((x) - 'A'))
#define CharOrd(x) (isupper(x) ? CharOrdUp(x) : CharOrdLow(x))

#define EBCDIC_CHAR_ADD_(x) ((x) < 0 ? 'a' : (x) > 25 ? 'z' : "abcdefghijklmnopqrstuvwxyz"[x])
#define EBCDIC_CHAR_ADD(c, s) (isupper(c) ? toupper(EBCDIC_CHAR_ADD_(CharOrdUp(c) + (s))) : EBCDIC_CHAR_ADD_(CharOrdLow(c) + (s)))

#define R13_(c) ("abcdefghijklmnopqrstuvwxyz"[((c) + 13) % 26])
#define ROT13(c, a) (isupper(c) ? toupper(R13_(CharOrdUp(c))) : R13_(CharOrdLow(c)))

#define NUL '\000'
#define BELL '\x2f'
#define BS '\x16'
#define TAB '\x05'
#define NL '\x15'
#define NL_STR (char_u *)"\x15"
#define FF '\x0C'
#define CAR '\x0D'
#define ESC '\x27'
#define ESC_STR (char_u *)"\x27"
#define ESC_STR_nc "\x27"
#define DEL 0x07
#define DEL_STR (char_u *)"\007"

#define POUND 0xB1

#define CTRL_F_STR "\056"
#define CTRL_H_STR "\026"
#define CTRL_V_STR "\062"

#define Ctrl_AT 0x00 /* @ */
#define Ctrl_A 0x01
#define Ctrl_B 0x02
#define Ctrl_C 0x03
#define Ctrl_D 0x37
#define Ctrl_E 0x2D
#define Ctrl_F 0x2E
#define Ctrl_G 0x2F
#define Ctrl_H 0x16
#define Ctrl_I 0x05
#define Ctrl_J 0x15
#define Ctrl_K 0x0B
#define Ctrl_L 0x0C
#define Ctrl_M 0x0D
#define Ctrl_N 0x0E
#define Ctrl_O 0x0F
#define Ctrl_P 0x10
#define Ctrl_Q 0x11
#define Ctrl_R 0x12
#define Ctrl_S 0x13
#define Ctrl_T 0x3C
#define Ctrl_U 0x3D
#define Ctrl_V 0x32
#define Ctrl_W 0x26
#define Ctrl_X 0x18
#define Ctrl_Y 0x19
#define Ctrl_Z 0x3F
/* CTRL- [ Left Square Bracket == ESC*/
#define Ctrl_RSB 0x1D /* ] Right Square Bracket */
#define Ctrl_BSL 0x1C /* \ BackSLash */
#define Ctrl_HAT 0x1E /* ^ */
#define Ctrl__ 0x1F

#define Ctrl_chr(x) (CtrlTable[(x)])
extern char CtrlTable[];

#define CtrlChar(x) ((x < ' ') ? CtrlCharTable[(x)] : 0)
extern char CtrlCharTable[];

#define MetaChar(x) ((x < ' ') ? MetaCharTable[(x)] : 0)
extern char MetaCharTable[];

#endif /* defined EBCDIC */

/* TODO: EBCDIC Code page dependent (here 1047) */
#define CSI 0x9b /* Control Sequence Introducer */
#define CSI_STR "\233"
#define DCS 0x90   /* Device Control String */
#define OSC 0x9d   /* Operating System Command */
#define STERM 0x9c /* String Terminator */

/*
 * Character that separates dir names in a path.
 * For MS-DOS, WIN32 and OS/2 we use a backslash.  A slash mostly works
 * fine, but there are places where it doesn't (e.g. in a command name).
 * For Acorn we use a dot.
 */
#ifdef BACKSLASH_IN_FILENAME
#define PATHSEP psepc
#define PATHSEPSTR pseps
#else
#define PATHSEP '/'
#define PATHSEPSTR "/"
#endif
